Active load alleviation potential of adaptive wind turbine blades using shape memory alloy actuators

Wind Energy ◽  
2019 ◽  
Vol 22 (5) ◽  
pp. 620-637 ◽  
Author(s):  
Anargyros A. Karakalas ◽  
Dimitris I. Manolas ◽  
Theodoros T. Machairas ◽  
Vasilis A. Riziotis ◽  
Dimitris A. Saravanos
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Wind Turbine ◽  
Turbine Blades ◽  
Wind Turbine Blades ◽  
Active Load

Active load control for wind turbine blades using trailing edge flap

2013 ◽  
Vol 16 (3) ◽  
pp. 263-278 ◽  
Author(s):  
Jong-Won Lee ◽  
Joong-Kwan Kim ◽  
Jae-Hung Han ◽  
Hyung-Kee Shin
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Load Control ◽  
Wind Turbine Blades ◽  
Trailing Edge ◽  
Active Load ◽  
Trailing Edge Flap

Analysis of long wind turbine blades with shape memory alloy wires in super-elastic phase

2018 ◽  
Vol 29 (15) ◽  
pp. 3108-3123 ◽  
Author(s):  
Rodrigo Nicoletti ◽  
Robert Liebich
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Wind Turbine ◽  
Turbine Blade ◽  
Wind Profile ◽  
Turbine Blades ◽  
Wind Turbine Blade ◽  
Operating Conditions ◽  
Hysteretic Behavior ◽  
Alloy Material

In this work, shape memory alloy wires are modeled and included in the model of a wind turbine blade, in order to numerically study their effect on blade vibrations under operating conditions. The blade is modeled using finite elements considering flapwise, edgewise, and torsional motion subjected to the effects of rotation and to a normal wind profile. The shape memory alloy wires are modeled in the super-elastic phase, thus presenting a hysteresis loop as a function of strain and ambient temperature. Such a hysteretic behavior of the shape memory alloy material adds damping to the structure that it is attached to. The numerical results show that inserting shape memory alloy wires in the wind turbine blade presents drawbacks, because the excitation level of the normal wind profile is not big enough for the blade to present significant strain. Hence, the hysteresis loops in the shape memory alloy material mounted on the blade have small areas which, consequently, reduce the amount of damping added to the blade. Besides, the added damping is restricted to the upper 30% of the blade (area of higher strain in the blade).

Experiments of Wind Turbine Blades with Rocket Triggered Lightning

2009 ◽  
Vol 129 (5) ◽  
pp. 689-695
Author(s):  
Masayuki Minowa ◽  
Shinichi Sumi ◽  
Masayasu Minami ◽  
Kenji Horii
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Wind Turbine Blades ◽  
Triggered Lightning

Folding of flexible hinges for aircraft wingtips and wind turbine blades

2021 ◽  
Author(s):  
Aileen G. Bowen Perez ◽  
Giovanni Zucco ◽  
Paul Weaver
Keyword(s):  
Wind Turbine ◽  
Turbine Blades ◽  
Wind Turbine Blades
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